Safety razor



Nov. 25, 1924.

J. A. D. WATT SAFETY RAZOR Filed Aug. 6. 1923 Inventor JAMES A k D. \NA-r'r.

Patented Nov. 25, 1924.

nnrrsn STATES PATENT @FFEfiE.

JAMES ALEX DENBY WATT, OF LONDON, ENGLAND.

Application filed August 6,

To all whom it may concern:

Be it known that JAMES :\I -EX.DENBY YVATT, a subject of the King of Great Britain, residing at M2 Tulse Hill, London, \V. 2, England, has invented a new and use ful Improvement in or Connected with Safet y Razors; and he does hereby declare the following to be a full, clear, and exact description of the same.

This invention has reference to improvements in or connected with safety razors and more especially safety razors ofthe kind in which the blade is pivotally mountcd within the blade carrier or upper part of the head of the razor. The object of the invention is to effect a positive and se cure locking of the blade when clamped down to the blade guard when the blade is in the shaving position.

The invention consists of a locking means for the blade of a safety razor characterized by the blade sheath or backing and/or the blade itself being provided with means for traversing the blade across theblade guard relative to the blade carrier and engaging one end of the said sheath, backing or blade with or under a section of the blade carrier for the purpose of securely locking the said sheath or backing and/or blade relative to the guard. The invention is particularly applicable to safety razor blades which are pivotally mounted in the head of the razor th one. end of the blade sheath or backing or the blade itself being formed with an inclined or chamfered end, which is adapted to be brought into abutment with a correspondingly inclined and undercut side or wing of the blade carrier or frame of the razor, the abutment and locking of the two similarly inclined end faces being effected by means of-a screw.

The preferred construction of the present invention as applied to a known construction of razor will now be described with reference to the accompanying drawings in which similar reference numerals indicate similar parts in the different views Fig. 1 is a front elevation of the razor head showing the present invention applied thereto the blade being shown in the locked position.

Fig. 2 is a front elevation showing the blade in the unlocked position with the blade in a raised position away from the blade guard, and

SAFETY RAZOR.

Serial No. 656,030.

Fig. 3 is a plan of Fig. l.

The form of razor illustrated is of a known construction embodying a blade guard, 4 on which is slidably mounted the blade carrier 5 which is adjustable in relation to the guard by means of the rotatable graduated milled headed screw 6. The blade edge 7 is secured in a sheath or back ing 8 which is formed with. a cylindrical hole in each end. lVithin one of these holes the end of a loosely fitting grub screw 9 is located the screw being secured in one side or wing of the blade carrier 5, and the other hole is freely engaged by the end of a clamping screw 10 which is provided with an elliptical head 10. The screw 10 has its end turned down to form a reduced cylindrical section which results in the formation of a shoulder 10 on the screw at the base of the thread thereof, this shoulder abuts against the end face of the sheath or backing 8 around the cylindrical hole in the said sheath or backing 8. The 0pposite end face 8 of the sheath or backing 8 is formed on an angle or chamfer and the side of the carrier 5 with which it is adapted to abut or contact is formed with a correspondingly inclined or undercut face 5.

hen it desired to lock the blade sheath or backing and the blade edge in the selected. shaving position relative to the blade guard at the screw 10 is advanced and the shoulder 10 thereof forces the sheath or backing and the edge 7 across the guard 4: until the inclined face 8 of the sheath or backing is in firm contact with the undercut inclined face 5 of the blade carrier 5. hen in this position the blade is positively locked relative to the blade guard and any accidental lifting or displacement of the blade is prevented, avoiding the usual form of projecting studs, books or lugs which form the ordinary locking means. When it is desired to free the blade for any purpose the screw 10 is loosened when the blade will readily pivot about the cvlindrical ends of the screws 9 and 10 as indicated in Figure hat I claim is:-

l. A safety razor having in combination a blade carrier, a razor blade pivotally mounted in said carrier, a blade guard, means for traversing the blade across the guard and for maintaining the blade in its locked position, an inclined end on the said blade, and a correspondingly inclined face on one side of the blade carrier adapted to abut the inclined end of the blade on the completion of the traverse of the said blade across the blade guard, whereby the blade is securely locked relative to the blade guard.

2. A safety razor having a blade carrier, a razor sheath pivotally mounted in said carrier, a razor blade secured in said sheath, a blade guard, a shouldered clamping screw adapted to traverse the blade sheath and blade across the guard, the shoulder of the screw contacting with one end of the blade sheath, an inclined end on the opposite end of the said sheath, and a correspondingly inclined face on one side of the blade "arrier adapted to abut the inclined end of the sheath on the completion of the traverse of said sheath and blade across the blade guard whereby the blade is securely locked relative to the blade guard.

21. A safety razor having a blade carrier,

a blade guard on which said carrier is adjustably mounted, a screw for coupling said carrier to the guard to effect the said adjustment, a sheath pivotally mounted in said carrier, a razor blade secured in said sheath, a shouldered clamping screw adapted to traverse the sheath and blade within the carrier across the guard and effect the locking of the blade sheath and guard within the carrier, an inclined face formed at one end of the said sheath and a correspondingly inclined face formed in one side of the blade carrier said faces being adapted to be brought into abutment by the rotation of the side clamping screw upon the completion of the traverse of the sheath and blade across the guard whereby the blade is securely locked relative to the blade guard.

In testimony whereof, I have signed my name to this specification.

JAMES ALEX DENBY VVAT'l. 

